Ethylene glycol is used as a protecting group for carbonyl groups in organic synthesis. Treating a ketone or aldehyde with ethylene glycol in the presence of an acid catalyst (e.g., p-toluenesulfonic acid; BF3â¢Et2O) gives the corresponding a 1,3-dioxolane, which is resistant to bases and other nucleophiles.
Charles Street and Beacon Hill in Historic Boston, Massachusetts. Shops on Charles Street are an eclectic mix of boutiques, galleries, jewelry stores and home accessory shops with plenty of nearby restaurants, inns and historic sites.
In Baltimore City, Charles Street is one of the city's main streets, dividing the west and east sides of the city. In Baltimore County, Charles Street continues as a major, multi-lane, divided road up to where it intersects with the Baltimore Beltway (exit 25). List of streets in Baltimore, Maryland.